<!DOCTYPE html>
<html>
<head lang="en">
    <meta charset="UTF-8">
    <title></title>
</head>
<body>
<div id="x">
    <div id="of-007"></div>
</div>

<script>
    var node1 = document.getElementById('x');
    var node2 = document.getElementById('of-007');

    node.d3 = 'xxx';

    +=l

    console.log(node1);
    console.log(node2);
</script>

</body>
</html>